81085220

素因数分解:

$2^2\times 5^1\times {\mathrm{4054261}}^1$

素因数の和:4054270

約数の個数: 12

約数和(自身を含む): 170279004

約数和(自身を除く): 89193784

約数列:

[1, 2, 4, 5, 10, 20, 4054261, 8108522, 16217044, 20271305, 40542610, 81085220]

約数ペア:

[(1, 81085220), (2, 40542610), (4, 20271305), (5, 16217044), (10, 8108522), (20, 4054261)]